<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<script>
    "use strict";
    let map = new Map([["king", 100], ["Grey", 99], ["Angel", 98]]);
    console.log(map.get("king"));
    map.set("KaiLi", 90);
    map.delete("Grey");

    let set = new Set([1,2,3,1,1,1]);
    set.add(4);// 添加
    set.delete(1);// 删除
    console.log(set.has(3));// 是否包含
</script>

</body>
</html>